Mitengonokutimachira nezvipfeko zvinogadzirwa kuChina ndizvozvinofungidzirwakukuwedzerapa30-40%mumavhiki anoteverapamwe neyakaronga kuvhara mumatunhu emaindasitiri eJiangsu, Zhejiang neGuangdong.Kudzimwa uku kuri kukonzerwa nekuedza kwehurumende kuderedza kuburitswa kwekabhoni uye kushomeka kwekugadzira magetsi nekuda kwekushaikwa kwemarasha.Iwo akaronga shutdowns arizvinofungidzirwakuenderera mberi kusvika Decemberof 2021.